1 files changed, 1 insertions, 1 deletions
diff --git a/email/email.scm b/email/email.scm
index ef2efe9..a791a0e 100644
--- a/email/email.scm
+++ b/email/email.scm
@@ -564,7 +564,7 @@
                 ((q) q-encoding-decode)
                 (else (error "Encoding of MIME word unknown" word)))
               encoded-text)
-             charset)))
+             charset 'substitute)))
    'post))
 
 (define (body->mime-entities body boundary)